scipy.sparse.csgraph.csgraph_from_masked¶
-
scipy.sparse.csgraph.
csgraph_from_masked
(graph)¶ Construct a CSR-format graph from a masked array.
New in version 0.11.0.
- Parameters
- graphMaskedArray
Input graph. Shape should be (n_nodes, n_nodes).
- Returns
- csgraphcsr_matrix
Compressed sparse representation of graph,
Examples
>>> import numpy as np >>> from scipy.sparse.csgraph import csgraph_from_masked
>>> graph_masked = np.ma.masked_array(data =[ ... [0, 1 , 2, 0], ... [0, 0, 0, 1], ... [0, 0, 0, 3], ... [0, 0, 0, 0] ... ], ... mask=[[ True, False, False , True], ... [ True, True , True, False], ... [ True , True, True ,False], ... [ True ,True , True , True]], ... fill_value = 0)
>>> csgraph_from_masked(graph_masked) <4x4 sparse matrix of type '<class 'numpy.float64'>' with 4 stored elements in Compressed Sparse Row format>